Installation:
Extract the content of the zip file to your game installation directory
and run the GrimInternals.exe. If you have the Steam-Version, then you must first startup Steam and then run my tool.

You might also read "how to add Grim Internals to the Steam-library" at the end of this post.

To enable/disable some of the features, press CTRL+F5 in-game!
This opens the Configurator

To make the most of all the possibilities offered by Grim Internals,
you need to edit the GrimInternals.ini file (located in Grim Dawn installation folder).
If you want to change some colors, here is a useful reference to the color codes (Source: Darkstalix)

automated screenshot function if you die (saved under the name: "_killshot.jpg" in your screenshot folder)
A suffix is append to the filename, depending on your game mode (SC = Softcore Mode, HC = Hardcore Mode)
(save the screenshot somewhere else if you want to keep it, because it will be overwritten if you die again.)

Disclaimer:
Use it at your own risk!
I'm not responsible for any kind of damage this tool made to your hardware or your brain.

A special THANK YOU goes to Darkstalix!
He has accompanied Grim Internals since its release in 2017 and
has proposed many improvements!

Localization file updated 09. Feb. 2019
Ask your favorite Localization-Manager to translate it to your preferred language
and to add it to one of the Grim Dawn Localization tag-files (e.g. "tags_ui.txt")

If your friends install it, it should work for them just fine. As is, however... It shouldn't affect Multiplayer, only what YOU see. And if your friends install it, only THEY would see it for THEIR character. It's not like it'd just show whenever any character was trapped, just yours.

Making it a mod doesn't actually change this at all, and in fact would make it worse for Multiplayer. As it stands, you can install this and play with people who do not have it installed. If it's a mod, then you'd only be able to play with people with the mod installed.

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For those who need comprehension aids:
Best/Opinion/Fact http://www.grimdawn.com/forums/showthread.php?p=492058#post492058